This smart Torch Auto app when opened and kept can detect low light conditions and switch on torch flash automatically. You can manually set conditions to OFF and ON based on LUX light. It does not work in background for 24x7. So, there is no draining of battery. It can also be used as LUX meter app.
It can be used at
1. No Inverter houses
2. Operation theatres
3. Houses with babies when always on lights to be present
4. Works that require light for short duration